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Radio frequency identification system based on open type software radio platform

A radio frequency identification system and software radio technology, applied in the field of radio frequency identification technology, can solve the problem that radio frequency identification readers cannot process the underlying information, etc., and achieve the effect of improving accuracy, reading speed, and strong configurability

Inactive Publication Date: 2013-03-13
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the traditional radio frequency identification reader cannot process the underlying information, the present invention proposes a programmable and low-cost radio frequency identification system, based on the basic idea of ​​software radio, using an open software radio platform, which can not only collect the top The information is transmitted to the background processing, and the MAC layer and physical layer of the RFID can also be observed or modified

Method used

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  • Radio frequency identification system based on open type software radio platform
  • Radio frequency identification system based on open type software radio platform
  • Radio frequency identification system based on open type software radio platform

Examples

Experimental program
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Embodiment 1

[0016] Example 1, such as figure 1 As shown, it is a functional block diagram of a specific embodiment of the present invention, which is composed of an open physical layer processing module 1 , a background processor 2 and an open hardware interface 3 .

[0017] The open physical layer processing module 1 includes a baseband processing module 101 , an AD / DA module 102 , multiple sets of radio frequency transceiver modules 103 and a clock module 104 .

[0018] The baseband processing module 101 is a high-performance FPGA, which extracts the required narrowband signal from the input intermediate frequency digital signal, and reduces the data rate so that the data can be transmitted to the background processor through an open hardware interface. In real-time signal processing, the underlying data processing volume is relatively large, and the processing speed is relatively high. At the same time, the signal bandwidth after intermediate frequency processing reaches tens of MHz. T...

Embodiment 2

[0024] Example 2, such as figure 2 Shown is the program flow chart of the present invention. The background processor 2 sends configuration information to the baseband processing module 101 according to user instructions, and transmits parameters such as channel bandwidth, Training, pulse width (PW), and modulation depth to each module through the open hardware interface 3 . The baseband processing module 101 then encodes the signal, sends the data stream to the AD / DA module 102, turns it into an I / Q complex signal, and sends it to the radio frequency transceiver module 103 to complete the conversion from the intermediate frequency signal to the radio frequency signal, and transmit it into space through the antenna.

[0025] On the reverse path, the RFID tag within the radiation range of the antenna senses the transmitted continuous wave (CW), returns the tag information to the reader through backscatter coupling, and sends it to the reader through two down-conversion and DA ...

Embodiment 3

[0026] Example 3, such as image 3 Shown is the label state transition diagram of the present invention. During the working process of the tag, there are four states of "power down", "ready", "recognition" and "data interaction". The tag enters the working range of the reader and enters the "ready" state from the off-site "power down" state. The reader selects the command to make all or part of the tags in the "ready" state enter the "recognition" state. When more than one tag enters the "recognition" state, it is necessary to achieve effective identification of tags through collision arbitration.

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Abstract

The invention discloses a radio frequency identification system based on an open type software radio platform. The radio frequency identification system is composed of an open type physical layer processing module, a background processor and an open type hardware interface module. A base band processing module of the open type physical layer processing module achieves conversion between a base band of a physical layer signal and an intermediate frequency signal. An analog to digital (AD) / digital to analog (DA) module can achieve high-speed conversion of analog to digital. The background processor achieves configuration and control of the platform, and label information, media access control (MAC) layer information and physical (PHY) layer information are shown through a graphical user interface (GUI). An open type hardware interface achieves transmission of platform data signals and control signals. A low-cost open type platform system capable of configuring a system bottom layer flexibly under different environments is provided for radio frequency identification (RFID).

Description

technical field [0001] The present invention relates to a radio frequency identification system, more specifically, relates to a radio frequency identification technology using an open software radio platform for communication between a tag and a reader. Background technique [0002] Radio Frequency Identification technology (RFID, Radio Frequency Identification) is composed of RFID tags, RFID readers and antennas. Its working process is: RFID readers generate electromagnetic waves of a specific frequency and emit them from the antenna through spatial coupling. When entering the reading distance of the RFID reader, the RFID tag receives the query signal and backscatters and couples the electromagnetic waves sent by the RFID reader to the RFID reader. RFID technology has been widely used in many fields such as logistics industry and retail industry, which has effectively improved management efficiency and greatly saved labor costs. However, the current RFID readers are all b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00
Inventor 钱国明陈涛陈毅华程玉才吴金娇
Owner NANJING UNIV OF POSTS & TELECOMM
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